@Celeste58.
Celeste, the map locator on your profile page is never going to be 100% accurate. It is to serve as a guide to give potential guests an indication if this is the general area they wish to stay in.
An accurate listing address will be given to guests when a reservation has been confirmed, and what you need to do is put your exact address including any area postal code into the 'Guest Resources' section of your listing description, along with your WiFi username and password and any entry details you need the guest to be aware of.
I understand that in your situation a few hundred metres may make a massive difference Celeste but I am afraid Airbnb are very secretive about listing addresses until a booking is confirmed!
I hope this helps you Celeste.
Cheers.....Rob